Fluke 5320A User Manual

5320A
Users Manual
4-20
6. If the rotary knob is used to change the current value, press Exit to go back to the
main screen.
7. Referring to the terminals part of the display, connect the UUT to the Calibrator.
8. Press O to start the calibration process.
The Calibrator adjusts the source voltage and resistance to get the UUT current as
close to the requested current as possible. This process takes about 2 seconds. The
Calibrator can only create an ac current with a frequency equal to that of the mains
supplying power to the Calibrator (50 or 60 Hz).
Substitute Leakage Current Mode
The substitute leakage current method, often used in Appliance testers, uses a safe low
level test voltage instead of power line voltage. The UUT measures the leakage current
flowing at its SENSE terminal. This current is used to calculate what the current would
be at the nominal power line voltage. This recalculated current is displayed for the
leakage current value.
The Calibrator works as a simple variable resistance. Using the nominal leakage current
and known nominal voltage in the power line, the calibrator calculates the appropriate
resistance using the following formula:
outalnoalno
RIVR −=
minmin
/
I
nominal
is the nominal leakage current set by the user.
After calculating the resistance, the Calibrator connects the resistance to the output
terminals.
To start a substitute leakage current calibration:
1. Press N.
2. If Substitute Leakage Current is not already displayed, press the Mode softkey.
3. Using the cursor keys or rotary knob, highlight the Substitute selection and either
press the Select softkey or press in on the rotary knob.
4. If necessary, either use the rotary knob or keypad to change the current value.
5. Referring to the TERMINALS area of the display, connect the UUT to the Calibrator.
6. Press the START button on the UUT.
7. Press O to start the calibration process.
Note
“Test voltage too low” message is displayed if the test voltage is less than
10 volts or the LC fuse is open.
8. When the Calibrator is finished with the calibrating process, press S to disconnect
the output terminals.
Figure 4-13 shows the resistor connected to OUTPUT HI – LO terminals.

Fluke 5320A Specifications

General

Brand	Fluke
Model	5320A
Category	Test Equipment
Language	English